单选题Before being shut down, a diesel engine should idle a few minutes in orderto ()Aprevent governor surging at shutdownBmake sure the fuel nozzles are flushed cleanCprevent pressure buildup in the fuel linesDprevent damage from localized overheating

单选题
Before being shut down, a diesel engine should idle a few minutes in orderto ()
A

prevent governor surging at shutdown

B

make sure the fuel nozzles are flushed clean

C

prevent pressure buildup in the fuel lines

D

prevent damage from localized overheating


参考解析

解析: 暂无解析

相关考题:

The main propulsion diesel continues running after you try to shut down. You should now attempt to .A.stop the fuel oil booster pumpB.engage the jacking gearC.secure the lube oil pumpD.shut off the fuel at the settling tank

Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.A.open the indicator cocksB.supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C.put the fuel handle in the "stop" positionD.pump up the air bottle

Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? .A.Reduce engine speed to idle before removing the filterB.Soak the dirty filter in kerosene onlyC.Blow out the air inlet with compressed airD.Cover the air inlet after removing the filter

The Chief and 3rd Engineers went below,changed the fuel to diesel oil and reduced the engine to slow ahead.This sentence implies all those below except that ________ .A.the Engine was not on slow ahead before Chief and 3rd Engineers went downB.the Engine was using diesel oil before Chief and 3rd Engineers went downC.the Engine was using fuel oil before Chief and 3rd Engineers went downD.the Chief and 3rd Engineers went into the Engine Room to operate the Engine

Which of the following shut down options should not be used before performing a consistent whole database backup?()A、NORMALB、TRANSACTIONALC、ABORTD、IMMEDIATEE、INCONSISTENT

单选题Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?()ATo prevent internal damage form local overheatingBTo ensure the fuel nozzles are flushed cleanCTo clear the smoke stackDTo let the waste heat boiler reduce its rate of steam generation

单选题To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()ASpeed limiting governorBOver-speed governorCOver-speed tripDOver-speed relay

单选题Before starting a diesel engine, you should always()Acheck the pyrometer readingsBcheck the crankcase oil levelCcheck the fuel oil strainersDclean the fuel system

单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except ()Aopen the indicator cocksBsupply some LO to cylinder liner wall with lubricatorCput the fuel handle in the stop positionDpump up the air bottle

单选题While maneuvering, you discover heavy smoke coming from the turbocharger casing, you should ()Acheck the air filter for dirtBcheck for an exhaust leakCcheck the cooling water temperatureDnotify the bridge that you are going to shut the engine down

单选题If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?()AIncrease the cooling water flow to the engineBSecure or reduce fuel to that cylinderCScrew down on the pressure adjusting spring to decrease to decrease popping pressureDReadjust the injection timing

单选题Clogged or partially obstructed exhaust ports on a diesel engine can cause()Aover-speeding of the engineBfailure of the engine to shut downCno effect of engine mounting boltsDhigh exhaust temperatures

单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should ().Aopen the bypass lineBcut in the lube oil coolerCpressurize the lube oil systemDtop off the expansion tank

单选题Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of ()Afree entry of air to the crankcaseBwater entering the crankcase while engine wash-downs are being performedCexcessive oil leakage during periods of increased blow-byDsub-cooling internal components

单选题A diesel engine fails to start because of water in the fuelIn order to start the engine, you should ()?Aturn engine with jacking gearBdrain filters and strainers and bleed off water at each injection pumpCuse ether to start the engine with blow-down valves openDblow through the cylinders and fuel lines with a drying agent

单选题An emergency diesel generator should automatically shut down in the event of ()Adangerous over-speedingBa loss of lube oil pressureCactivation of the fixed CO2 system for the emergency generator spaceDall of the above

单选题If a main propulsion diesel engine hunts excessively at idle speed, you should ()Aadjusts the idle speed controlBdrain and flushes the governor and replace the oilCadjusts the compensating needle valve

单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to()Aprevent the diesel engine surgingBprevent governor from being damaged because of swingCreduce the probability of the crank shaft being torsional vibrated and resonatedDprevent the main engine being overload or overspeed

单选题Which of the following shut down options should not be used before performing a consistent whole database backup?()ANORMALBTRANSACTIONALCABORTDIMMEDIATEEINCONSISTENT

单选题The booster pump, which supplies diesel oil to() , should have a possibility of being powered by compressed air or by emergency power.Athe main enginesBthe auxiliary enginesCthe emergency generator engineDthe auxiliary engines and the main engine(s)

单选题An automated diesel engine should normally shut down due to ()Alow lube oil temperatureBhigh ambient air temperatureClow tube oil pressureDhigh exhaust system back pressure

单选题Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?()AReduce engine speed to idle before removing the filterBSoak the dirty filter in kerosene onlyCBlow out the air inlet with compressed airDCover the air inlet after removing the filter

单选题Diesel engine automated control systems may utilize sensing devices of dual function, with sensing ranges providing both alarm and engine shut down capability.Which of the key points would only require an alarm sensor?()ALube oil pressure and temperatureBjacket water pressure and temperatureCEngine over-speedDLube oil sump level

单选题Which statement about diesel engine combustion is true?()ACombustion does not begin until the piston starts down on the power strokeBMaximum combustion pressure is reached before TDCCTurbulence in the cylinder causes a delay in ignitionDMaximum cylinder firing pressure is not developed until the piston passes TDC

单选题Before being shut down, a diesel engine should idle a few minutes in orderto ()Aprevent governor surging at shutdownBmake sure the fuel nozzles are flushed cleanCprevent pressure buildup in the fuel linesDprevent damage from localized overheating

单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except()Aopen the indicator cocksBsupply some CYL Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)Cput the fuel handle in the “stop” positionDpump up the air bottle

单选题If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?()AOpen the crankcase immediately to check for damageBApply fire fighting water through the crankcase breatherCAllow the engine to cool before opening the crankcaseDAssume that there is no damage to the crankshaft

单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?()AThe diesel oil must never be allowed to mix with the heavy fuelBThe temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveCThe heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveDThe heating steam must be secured before the diesel oil passes through the three-way valve